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Date: Fri, 04 Jul 2014 18:09:52 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 2/2] virtio-blk: dataplane: notify guest as
 a batch
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To: Ming Lei <ming.lei@canonical.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Peter Maydell <peter.maydell@linaro.org>, Fam Zheng <famz@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, qemu-devel <qemu-devel@nongnu.org>, Stefan Hajnoczi <stefanha@redhat.com>

Il 04/07/2014 17:57, Ming Lei ha scritto:
> But we have two cases to consider:
>
> - one submitted IO includes requests from multi vq(virtio-blk or
> virtio-scsi maybe),
> and each vq has to notify guest
>
> - one submitted IO includes requests from multi bs for scsi device
>
> The 2nd case should be easy to handle, but I am a bit headache for the 1st case.

You can just have one bottom half per virtqueue. :)

Paolo